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The Metal - Oxide Composite [Fe0.2Co0.8]0.8[Fe2.38Co0.62O4]: Hrtem and EDX Characterization

Published online by Cambridge University Press:  21 February 2011

J. C Yamegni Noubeyo ,
A. Malats I Riera ,
J. Werckmann ,
G. Pourroy ,
G. Ehret  and
P. Poix
J. C Yamegni Noubeyo
Affiliation:
IPCMS, 23, aie du Loess, BP 20 CR, F-67037 Strasbourg cedex, France
A. Malats I Riera
Affiliation:
IPCMS, 23, aie du Loess, BP 20 CR, F-67037 Strasbourg cedex, France
J. Werckmann
Affiliation:
IPCMS, 23, aie du Loess, BP 20 CR, F-67037 Strasbourg cedex, France
G. Pourroy
Affiliation:
IPCMS, 23, aie du Loess, BP 20 CR, F-67037 Strasbourg cedex, France
G. Ehret
Affiliation:
IPCMS, 23, aie du Loess, BP 20 CR, F-67037 Strasbourg cedex, France
P. Poix
Affiliation:
IPCMS, 23, aie du Loess, BP 20 CR, F-67037 Strasbourg cedex, France
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Abstract

The new metal-ferrite composite [Fe0.2Co0.8]0.8[Fe2.38Co0.62O4] is obtained by precipitation of ferrous and cobalt chloride in KOH. Further heating under vacuum above 400°C shows a cationic exchange between metal and spinel leading to a new composite made up of cobalt metal and cobalt doped magnetite.

HTERM and EDX observations have been carried out on both composites, i.e., before and after vacuum annealing, We show that cationic exchange occurs mainly in crystals made up of spinel, CoO and amorphous nanoparticles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 385
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

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